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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9301ec86dda49faf2a6b87d13a157da1d48d3102c5dc2ca8380816b8cb743857' 
  AND token = 'LcjepMaaYiHK9Ca0jVyUjYrThZV79TxQp6Sok8uEvv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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