Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd20ed0d905c0cc22cec4172c123872ed9dbc808db52b01ca91671da80a00de2' 
  AND token = 'LssLTx8OegxKonzTme3+4lUyz7uU2TKH7ipzy/UpwX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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