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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cfd47dbeaa3c7d327327878a25fbc52b8091139d90fa5b98d079c3e6e30bd0b' 
  AND token = 'cMpZo5mG3v82g/2XUSE/Ce5Tx8perHF4ZrMdVPgDuf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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