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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '500de2382cd0128ecd7ad836ae46562d6b78294fa96569304dc8043d8d70eeef' 
  AND token = 'fjPBwq62bMbhyXIQxSMiCKSQ7avs5KkXla/Q5rZ0HDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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