SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edd30b4286ad45060d28fcab87650e76d3f321a0f01ec5710c862b192d49b858' 
  AND token = 'lSPm0gj2h3FbuCmHjSKwgen169p4UHOnPVYBhuNx/Xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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