SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd99827ccf6f131c576c4a173ea7215a70401132937c249126d4d68f866cbe151' 
  AND token = 'TswXd6j/gERWt3RYGHZeFqIrQzb16gFBU8tefrx/Zg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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