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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c84800c28a566e3dbc9f29c642ce98047a22f2fb9107aa8ea1a80ce3d88a5ef7' 
  AND token = 'WVqmLSeqavcghT44bqc3W62C4+3mUs06aVZTzp7JZpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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