Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a26699530653ce6b59d3e779746684ef9d002865ca9f013007aaa6768b28107c' 
  AND token = 'peXFqGZuJuFqQVwYAD579q2fEEdy/UwwbfFrCGV9hfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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