Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '189afc44281206ccf3ebf15b0722901c1e47495681b17448baf31363180abf36' 
  AND token = '3ggqEPLLZur+Da0nMGkosXOyxSgNqkJj99M1Sgr0Gek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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