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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b5ce8cc0e2ab8957d73d56fb66a3169514853ff7d9076ea66f00c525a78cf44' 
  AND token = 'ETOd8iZBtLJeVxVIIjn0/Gq1+z0cMIjwDET7AUL0DeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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