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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95b7fd4e2626e5046f6c46733e1ac73ea66a0638d3d5be2db26e2cdf08eb618c' 
  AND token = '9qfUrTykcikvbiI0dMoiJ3u8JCfQSVVVjVTe/xjDXc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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