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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d743a0d4291e7be40104c0536dca548647b8ad53286591c772cb3e893532062' 
  AND token = 'mxLm3SFZdYQRi51dNvMWOoh3nQ12N2XvNsdQ4ZlL9yM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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