Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88ba9012324d62dd277d3dcfc738739bf1dddc62cc3e9dc2eaa9476946eda17c' 
  AND token = 'hrMSIigP1I6IFNVY9NYv8cg0jVPxfCZluSfuNNl0BIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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