Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b272f543b39f0242cae18ee64f80e4ea8ff67dba0e96c1f4143d523114b53d01' 
  AND token = 'vfHEYiXLsHeqVpsx3YPn8yY+gGbtle6rMMF6NFp1S5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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