Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1c256fb8c2265e338ba06008dcf8dd9eec94488facc8382b1dd5a1acb794a91' 
  AND token = 'DyvONuaLdwfyyTdOEllJRs/Hecq45hXRHriML3Iv6Oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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