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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ba28568c1cff81574cf02994b7d7e23c77205b7e49dbd05422b7b66a9417813' 
  AND token = 'HQ1t9kH1OzBfepLJeIHZFTTuH7ayvOeIA2E17TWwcOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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