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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89abf9ea4d8cd0cd4faf2fabba3c81122c5f3fc67bef08f785c3d63df052dc74' 
  AND token = 'kqDZhagf6lw7UQwPNuboXk7bCSzG4Kih2Aqhf0O/YuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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