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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad0745a9ef0adecbc78bc96912f2c9557c5b24c14b3d687bade4f121bd37076f' 
  AND token = '2SmsTVi1k/K3bSDy3D9i7UNdh08O0SeikX/JvqNtPhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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