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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b78fea4361f5f7efc4f5cba00eec51e31cf7f11fcac6e51f7f774fc7ff851f' 
  AND token = 'Yv11ju5wiBL7UKLRGimLOjgxh78W/55UFdLS5tzJ9qY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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