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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0890cee3254f8804df8129487ef23823480064e39c79143802d876d4d7c4d65e' 
  AND token = 'ONE2UQpq8waYaQ6EXVFq6d1esOO/azbRUGDTPZpZ9LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00117

JSON explain

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