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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cac3604b8a7320ea2cafe1337bb8fc8bc8c0e836955bd824e6c483b2bb8f5ba' 
  AND token = 'rZD/ttlu4HEoBuU7SURTvSJIqs8vDzw9MEyWQlfEdE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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