SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2215ed9a7d314ffef68f65163a973d86b4f1dd348e3ac493241b99b055c6ff25' 
  AND token = 'PriMCqZzYwOchUHFXHn9vJs0Zgyn3d3Eas+C1032hSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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