Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd8294765cfd9a52f1aec9996624da03262050ba65f8ee42f6684272fe7ce090' 
  AND token = 'ZOZ5c8AolldAZbUTYIl4NhagyxPIGZ+cgYFlWOiX2Cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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