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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd48e5586c04377ad4fdc90f9fe3de565667e7fd4d98a9d3154034c9e22cc156b' 
  AND token = 'Drhsoy35fGaU67RQX8qiiPoGV6m/jkPSE7NMNScK868=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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