SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc9e026ae4915b86238e2c9f2a4cf9cddbb22387194c3c4435b81f69955eaa88' 
  AND token = 'xweVWjOmwPJjrJljGQN384zk8pGIMARsDFBoLlSLn1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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