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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8060a1a6503c7c6cffa7ad4945c2b5ca465533a1e6a4d912c8d3f4174c2c4272' 
  AND token = 'FWkNpRniudHiR2RIKWZISGe5rV277vvrIhGbqI46Hdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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