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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0467026108214b6ab92e3d7c2c52b633ff531b13bf469dc2d43f026359c39d73' 
  AND token = 'JosT5p0N/sQHDKl3gqOpjeuaLA5DKhbri5n5sJLkraQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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