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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebec413b8a8b3908936c923df3b1a4d847b37b6bcc9c19ad6d5685318bc8bd01' 
  AND token = 'k5+QGwdRghyzPQGSwHDIALxN/6hLr2TPWpowMX1LzRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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