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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b3b6e9c5932a0ef0410a717ce9ab460b8bd1d1d89038c965f4661a9f5596ba0' 
  AND token = '+PO+HwCaMxtary/+qx62aWe5W2Y+1DPNVzl+ySPdysA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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