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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '045dbd1ff3fd94c474ca6df33de37df285a10cfd426080017a1b552bbb9ed4f5' 
  AND token = '/3L18hUm26l1+Fu0kXJnexZEYPiH/2ck9ycA4pAhwwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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