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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d11ab193e587145ea1ed475973d24c58864696475635fc75c317d5b5d806211' 
  AND token = '3Ez1eqjfE2A95y1NdTckrMDZuUjrYk7jaHXVt1tAzr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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