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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9de271efef7cfbbc3b5f16f9d68ec90e4432e6fbb9ea9b58fa138655ff0d13df' 
  AND token = 's4piTeg2Kgn9zpmeSbVkYd0z1Mdc8CX4zpk6yfaZuAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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