SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d1d07ba886743a4f2700bf4964bed7c0ffad68a68d487d4b7dca6de736130bd' 
  AND token = '8HZoGZKl0dtRp2QxvmVMCsJjSrq2YAGO5WV6O8KZjBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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