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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed04890aea2208339b2639fd4398f7fcce66d0d0defeaf82509bf0becbfe4a80' 
  AND token = '84CW+MnpE2jYLyG9PZKsOisyT0b0pqSAVL8fK0utOW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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