Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c3e1bc1d5034d202b35b2ae8542964645a1d6ced5bb7a205ebb31c654e9f5cce' 
  AND token = '84Iz3aX97lLL0q5/CfG5j/vlPPAGSktAjfCLckRxDAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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