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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64f064243a99d6da17b7dd68da0fb0574b400d740ebe2689d2baf59b0312a6c4' 
  AND token = '7m6+RSpCHv6EDfx/msgDxhOFtBt0ouybbWWKy4lpIzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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