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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14e2c21c1208f5c780a1bb70137649d5f8284de8910cb30c335f1ce90dd50f03' 
  AND token = 'aT9jIeyxwV3VpkXNGElq2mglBX7jikFP6OlpBYXF8a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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