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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab3c0567a6e46cc4f0d01d79fdf86fb432932bb76ef8262f6acdc15e23b6ddaa' 
  AND token = 'HNRv2QvG2h4TGieTz0LUN7uZINcb4DRBGytnHNgvvzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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