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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb22cf1b68a46a5d79f8cd53ec5ab6a8e46da63f6ae36f61eeeba4a3a1daa37b' 
  AND token = 'NRixD+9TPrs1KM3duJybfCodhmdEImiW2N7EACTDNNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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