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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3506715aacda3b4c3cc30daeb0c1f4f6bd0a91343b9aa16a8c730a5281792e28' 
  AND token = 'Crc+rp+15jDbI5OPC5HRBz06jG9bqYOdi/1spAz/3oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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