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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72755d7d72c59ef4fbdd3a0abed4d6cae87428aa0cd0ace8793743a71970e730' 
  AND token = 'z6sEH9wgL8IanUCVAgsuT/0WX7jubPtAi++n0KkyYKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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