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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28d8feb5d2da88c96cd2214cc2dcbf0ec104b82b5fb8813e11bba9959efc1822' 
  AND token = 'Bsxv+sfHLc9YVE0dZetqNZn/PDr8eFnxEHwb7VQV7Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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