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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1190e29bfc073051bc86bd196a2c6663944a9c07ea874cc0f7cfef0e432b473' 
  AND token = '+9ZOXx5qwMUJscNA6hQp1WqfihNInb49c/Qq56Ti8YA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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