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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b22bf328a97ae8a75625635131ef5c6bc0089de8caf74cebb3e93bd55defffa' 
  AND token = 'dvU5bFbhVMT5DX0+3sFjDjL7xw2UqCrU0M+cursK7zM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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