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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8877046c161b436ad7b0f9babf47bf1970b34ad8a33b19921f5091b4ba676a7b' 
  AND token = 'XJr5J2ptmgGbwB3aUVhUl3Gx5Fqi3rdPBEiE7xE2iAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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