Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '376a0eeb1358403dd90b0930b8c10b749562e65664c3ee238a8dab8ca57c1c5f' 
  AND token = '7PsJno3KwsNukdKb734LpJAKWpYiRZ2m6Ekv2RrCHUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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