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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4da388e0d3f6ee4be40aabaf1887dec581d8cb335a6521402ec1ef04ea468b' 
  AND token = 'knnYOuVaHO9aCmVFJJbu0C5H8th0jG3SzffJuX6Okvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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