Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b432fb9e9acad84af8edc0e4cb53779ddabdd310c1b32a7827d8df8d5bd103f7' 
  AND token = 'n/bRuJc04mBIL6ND4ui4lwAaEsAbEIWNRBbjtHiBADE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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