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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041a17ff930fa7e4327c3edb5df2232ffb74824082fb2662c6e2b16daf4b1fcc' 
  AND token = 'GgB1BJTfn6ztf2CivvzS31M+jkx5eGsaEC1d7BbNpng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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