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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1353f6a2151940603f3454ab8a2a9b8e8e97a45a049d0ecde9a7d9e085bff887' 
  AND token = '5mqEdD21NEOoNZ1pcZDeLUWUhgZxcfw37aLfP3bV99o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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