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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbdfd75e02e2fc8c26d7ca5225b9b90fc86cb887899fe11e52fe757a596f8e4c' 
  AND token = 'YZC8wYvyO0lFDRceAgE74cTl6KVi5HiOpuRekCqc0PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00081

JSON explain

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