Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b6cf29d67b49ca7c1d7f53c1bf8bae653c73bdf8c96146926acfbf8d74b8a02' 
  AND token = 'KERljF9A3qV83v79O7PEFbqScEtH4AgnwMM9PGb5x4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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