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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd132d257a0167aa177b8e58e8cc6b6f7e055f41b9ab9af769d417cc508a11fd3' 
  AND token = 'UmjO1Q2TkfdKhYT7b/M1alC49QfdyGBrzDQfjTd89+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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