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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d267bb5765f16617b64b780de748fa6b33445c62ce7fcb3b7e7b5596f263007' 
  AND token = '06fhDm6Ig69hqJvXNkkI2rMqoPEy8HqnIC9/2tbkR6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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