Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ca6fbea959bf7d94803d1abde337dc162b4457be0c38ea50b70ba6d09a1348' 
  AND token = 'FRMwr1Lw/BcyDFrz0i/uqxo7SeBuOPpPkobkFD1C3gU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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