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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f057636a115b0a5a4ff395065a710727d71db55f8de82a08364e907438aaccc' 
  AND token = 'E2PVTs7Z3w33a8DrAETEv15gH1wUhcWQoUE5ATyWtF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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