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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22a27e8adf7f83af623fa61b406e242d68816a1638f26186802490b7b5dcb341' 
  AND token = 'hz6+YBP5yBYQ9vbfmb8Aowbi4tzWso7dGZTvGH2aDzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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