Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93a02c0842dc1d84aa082c17e1a3b1705f09432786d0e0e67fede9a48dedab8f' 
  AND token = 'T49kgVNLiTguIIQwRFW/32ac3I8F+Spo2A1Po0iMX2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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