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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b0d79fb27926db6cc9958eb7b7a803521197e2b96b52023b05d9fa70593eecb' 
  AND token = '0W6Q1pxiz5jOEn9khXXHkb6JjObrcG8eYhFKt6N7U38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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