Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa7fd086d12e037fac6bd9bea7699e65beb8f0dca1bc1c0fb4978cf24706c89a' 
  AND token = 'IG4cZ+8c/y6roT0ArpPNtfpy4UFcPXM6G4H4PM4q9Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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