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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea2b26e37428f78a81d39e11e0175407521d10ab3dc482e85ce1128837e91904' 
  AND token = 'LMUGAAHlXnalQCVIOPyE8toVYA9slmJUEIFIaMyQ7lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}